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How can I conditionally require form inputs with AngularJS?
Suppose we're building an address book application (contrived example) with AngularJS.
5 Answers
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Rails 4 - Strong Parameters - Nested Objects
...nside a hash… like this
params.require(:foo).permit(:bar, {:baz => [:x, :y]})
Rails actually have pretty good documentation on this: http://api.rubyonrails.org/classes/ActionController/Parameters.html#method-i-permit
For further clarification, you could look at the implementation of permi...
Redirect stderr and stdout in Bash
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This syntax is deprecated according to the Bash Hackers Wiki. Is it?
– Salman von Abbas
Jul 11 '12 at 1:10
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How do CSS triangles work?
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CSS Triangles: A Tragedy in Five Acts
As alex said, borders of equal width butt up against each other at 45 degree angles:
When you have no top border, it looks like this:
Then you give it a width of 0...
...and a height of 0...
...and finally, you make the...
POST data in JSON format
...input.name] = input.value;
}
}
// construct an HTTP request
var xhr = new XMLHttpRequest();
xhr.open(form.method, form.action, true);
xhr.setRequestHeader('Content-Type', 'application/json; charset=UTF-8');
// send the collected data as JSON
xhr.send(JSON.stringify(data));
xhr...
How to put an image in div with CSS?
...>
and in CSS :
div.image {
content:url(http://placehold.it/350x150);
}
you can try it on this link :
http://jsfiddle.net/XAh2d/
this is a link about css content
http://css-tricks.com/css-content/
This has been tested on Chrome, firefox and Safari. (I'm on a mac, so if someone has...
Create objective-c class instance by name?
... risk of mistyping the class name or otherwise using a class that doesn't exist. You won't find out until runtime if you make that error. Instead, if you use the built-in objective-c type of Class to create a variable, then the compiler will verify that the class exists.
For example, in your .h:
@...
How to make my layout able to scroll down?
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Just wrap all that inside a ScrollView:
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<!-- Here you put the r...
How to use Class in Java?
...ss Class allows you, among other things, to write things like
Class<? extends Collection> someCollectionClass = someMethod();
and then you can be sure that the Class object you receive extends Collection, and an instance of this class will be (at least) a Collection.
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Specify an SSH key for git push for a given domain
...host are the same, they can still be distinguished in ~/.ssh/config. For example, if your configuration looks like this:
Host gitolite-as-alice
HostName git.company.com
User git
IdentityFile /home/whoever/.ssh/id_rsa.alice
IdentitiesOnly yes
Host gitolite-as-bob
HostName git.company.com...